feat: extend daemon model with daemon status tracking and list support

- Add daemon status tracking with state and metrics (idle, running, error)
- Implement pfhub daemon list CLI command for viewing registered daemons
- Extend auth schema and service for daemon lifecycle management
- Add postgres repository queries for daemon state persistence
- Expand test coverage for daemon registry and status transitions
- Update rel-006 release document with daemon model verification results
- Support daemon graceful shutdown and error recovery patterns

app/services/auth_service.py

@@ -161,6 +161,21 @@ class AuthService:
         raw_token, auth_token = self._repository.rotate_service_token(name)
         return IssuedServiceToken(token=raw_token, auth_token=auth_token)
 
+    def rebind_service_token(self, name: str, daemon_id: str) -> tuple[str | None, AuthToken]:
+        existing = self._repository.get_service_token_by_name(name)
+        if existing is None:
+            raise ValueError(f"서비스 토큰을 찾을 수 없습니다: {name}")
+
+        daemon = self._repository.get_daemon_by_id(daemon_id)
+        if daemon is None or not daemon.is_active:
+            raise ValueError(f"존재하지 않거나 비활성 데몬입니다: {daemon_id}")
+        if daemon.owner_user_id != existing.user_id:
+            raise ValueError("데몬이 해당 토큰 사용자에 속하지 않습니다")
+
+        previous_daemon_id = existing.daemon_id
+        rebound = self._repository.rebind_service_token(name, daemon_id)
+        return previous_daemon_id, rebound
+
     def revoke_service_token(self, name: str) -> datetime:
         existing = self._repository.get_service_token_by_name(name)
         if existing is None: